4411.93.10.00 - Not mechanically worked or surface covered

This HTS subcategory, 4411.93.10.00, specifically covers fiberboard made from wood or other ligneous materials that have not undergone mechanical working beyond basic processing, nor have they been covered with any surface treatments or coatings. This includes materials where binders such as resins or other organic substances have been used to consolidate the fibers. The defining characteristic for this classification is its density, which must fall within the range exceeding 0.5 g/cm³ but not exceeding 0.8 g/cm³.

Distinguishing this category from its siblings, the "Other" sibling at the same level, involves a strict adherence to the specified density range. While the broader "Other" category might encompass fiberboard with different densities or processing statuses, 4411.93.10.00 is precisely for those in the middle-to-high density range that remain in their raw, unfabricated state. This focus on density ensures accurate classification based on physical properties.

As this is a leaf node within the HTS structure, there are no further subcategories to introduce. Classification within this node is final, meaning that any fiberboard meeting the criteria of being made from wood or other ligneous materials, bonded with organic substances, not mechanically worked or surface covered, and falling within the density range of 0.5 to 0.8 g/cm³ will be classified under 4411.93.10.00. Examples could include medium-density fiberboard (MDF) or hardboard that meets these precise specifications before any painting, laminating, or routing.